Joined: Jan 2010
Posts: 9,828
Likes: 1,806
From: Northern California
Bikes: Cheltenham-Pedersen racer, Boulder F/S Paris-Roubaix, Varsity racer, '52 Christophe, '62 Continental, '92 Merckx, '75 Limongi, '76 Presto, '72 Gitane SC, '71 Schwinn SS, etc.
Are you measuring the ST angle off of the TT angle, or perhaps on a not-so-level surface?
Did you measure the STL as center-to-top or C-C?
I can't really imagine this particular Bianchi having a 72-degree ST angle.